Gross income of SGD 50,000
- Input
- Gross income SGD 50,000; eligible reliefs SGD 10,000
- Result
- Chargeable income SGD 40,000; estimated tax SGD 550
- What it means
- Tax is not SGD 50,000 multiplied by one rate. Earlier bands are taxed at lower rates.
Personal income tax
Estimate resident tax using progressive rates.
From gross income to tax: three resident scenarios
These simplified resident examples first subtract user-confirmed reliefs to reach chargeable income, then apply the progressive tax bands.
Gross income of SGD 80,000
- Input
- Gross income SGD 80,000; eligible reliefs SGD 12,000
- Result
- Chargeable income SGD 68,000; estimated tax SGD 2,510
- What it means
- Reliefs affect the tax base before progressive rates are applied. The top marginal rate does not apply to all income.
Gross income of SGD 120,000
- Input
- Gross income SGD 120,000; eligible reliefs SGD 20,000
- Result
- Chargeable income SGD 100,000; estimated tax SGD 5,650
- What it means
- This can guide budgeting, but the Notice of Assessment can also reflect other income, deductions, rebates and personal eligibility.
How should you use the calculated result?
The headline is resident individual tax estimated from the chargeable income you entered. It is not an automatic monthly payroll deduction, and the calculator does not decide whether each relief is valid for you.
Turn an annual estimate into a cash-flow buffer
- Dividing the annual estimate by 12 can guide a monthly reserve, but it is not the formal IRAS instalment amount.
- If income or reliefs are uncertain, run a second estimate with fewer reliefs instead of budgeting from the most optimistic case.
When should you not use this result directly?
- Non-residents, partnerships, self-employment, rental income and complex overseas income should not rely on this simplified result alone.
- Reliefs, expenses, donations, rebates and one-off income require personal checks; entering a relief does not make it IRAS-approved.
- Final liability follows the IRAS filing outcome and Notice of Assessment, and the rates must match the relevant Year of Assessment.
Continue with the resident income tax guide
The guide explains why salary is not chargeable income, then walks through tax bands, reliefs and three income levels.
Official source: Open authority guidance
Rules last checked: 7 Sep 2026. See the Sources page.